【C20】

A．necessary

B．easy

C．important

D．hard

【C18】

A．sharply

B．instantly

C．gradually

D．occasionally

People were not allowed to enter the reading room because it______ then.

A．had been painted

B．was being painted

C．was painting

D．painted

【C15】

A．Here

B．They

C．There

D．Those

What is the best title for the passage

A．A Robber Caught.

B．A Heroic Woman.

C．A Reward of $ 60 000.

D．An Attempted Robbery.

—When do we need to pay the balance —______September

A．In

B．By

C．During

D．Within